答案
解:(1)2×(-3)+4×2=-6+4×2=-6+8=2;
(2)[-8+4÷(-2)]×3=[-8-2]×3=-10×3=-30;
(3)(-1)
3-
×[2-(-3)
2]=-1-
×[2-9]=-1+
=
;
(4)25×(-
)+16÷
-30×
=25×(-
)+16×
-30×
=(25-16+30)×(-
)
=39×(-
)
=-6.
解:(1)2×(-3)+4×2=-6+4×2=-6+8=2;
(2)[-8+4÷(-2)]×3=[-8-2]×3=-10×3=-30;
(3)(-1)
3-
×[2-(-3)
2]=-1-
×[2-9]=-1+
=
;
(4)25×(-
)+16÷
-30×
=25×(-
)+16×
-30×
=(25-16+30)×(-
)
=39×(-
)
=-6.